Mold.



H. C. WALKER.

MOLD.

APPLICATION FILED DEC. 19. 1911.

Patented Aug. 31, 1915.

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illlllllllllllllll H. C. WALKER.

MOLD.

APPLICATION FILED 0:20.19. I911.

1 1 5 1 3 1 a I Patented Aug. 31, 1915.

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manner.

Specification of Letters Patent. Patented Aug. 311, 11915.,

Application filed December 19, 1911. Serial No. 666,691.

To all whom it may concern:

Be it known that I, HOWARD C. WALKER, a citizen of the United States, residing at Prince George, in the county of Prince Georges and State of Maryland, have in vented certain new and useful Improvements in Molds, of which the following is a specification.

This invention relate to molds and particularly to that class of molds which are employed for constructing what may be named one-piece-concretehouses, one object of the invention being to provide a construe tion of mold wherein stock materials are exclusively used in its production whereby it I may be manufactured at a minimum cost.

Another object of the invention is to provide a mold which will embody sections that are so constructed that they are adapted for such interfitting engagement that will positively seal the joints therebctween when the sections are set up'whereby the slush will be held against escaping from between the joints during the molding operation.

Another object of the invention is to provide binding or tie elements for holding the inner and outer walls of the mold properly and uniformly spaced apart, thesaid elements being of such construction whereby they may become a permanent part of the walls of the house as the mold is knocked dowln and thereby materially reinforce said wal s.

Another object of the invention is to pro vide a mold in which all of the sections with the exception of those used atthe corners are identically constructed thereby eliminating confusion when assembling the mold.

A still further object of the invention is to provide mold sections wherein the bars employed for the tongue and groove formation at the edges of the sections will serve to reinforce the sections to prevent them from becoming distorted under rough usage.

Another object of the invention is to provide means for efiectively holding the mold units or sections in proper alinement when set up, the said means also lending admirably as a weight to assist in maintaining the sections operatively superimposed when set-up.

In the drawings forming a portion of this application and in which like numerals indicate similar parts in the several views Figure 1 is a perspective view of a portion of the mold with parts broken away and parts in section to clearly illustrate the invention. Fig. 2 is a horizontal section taken on line 22 of Fig. 1. Fig. 3 is side view of a portion of one of the walls of the mold. Fig. 4. is a horizontal section taken on line 1 4 of Fig. 3. Fig.5 is side View of por-- tions of twoof the mold sections having the locking hook therefor, and indicating in dotted lines the partly released position of the hook and in full lines the locked position of the hook. Fig. 6 is a section on line 6-6 of Fig. 5 showing the hook in full lines. Fig. 7 is a vertical section on line 7-7 of Fig. 3. Fig. 8 is a section on line 88 of Fig. 3.

My improved concrete form or mold comprises the inner wall A and the outer wall B, both of which being substantially identically constructed and comprising the side wall forming sections 1 and the corner sections 2. The side wall forming sections are constructed from flat sheet metal such as steel, sheet iron, or other suitable stock ma terial and each is provided with the vertical side bars 3' and at and the top and bottom bars 5 and 6 respectively. Each of these bars is identically constructed and is formed of rolled or cast iron and provided with a rabbeted portion in one side. From this construction it is seen that the top bar and the left side bar of each section present the horizontal and vertical tongue 7 and 8 respectively and the longitudinal shoulders 9, the edges of the section, presenting similar shoulders 10 which are disposed in direct alinement with said shoulders 9 as shown in Figs. 6 and 7 of the drawings.

The rabbeted portions in the top and bottom bars are so disposed with relation to the sections that the walls of the latter and the walls of the former combine in presenting therebetween the intervening horizontal and vertical grooves 11 and 12. It is now seen that the mold units or sections are adapted for interfitting engagement with each other whereby they may be arranged superimposed and side by side according to the area desired to be covered.

It is essential that means be employed for effecting a perfect liquid tight connection between the mold sections, hence the provision of the tongue and groove construction of said sections as hereinbefore described, and to assist in the purpose of this construction, ll employ means whereby the sections may be adjusted relatively longitudinally of the mold. The top and bottom bars and the vertical bars of the sections are secured to the sections by. rivets 13, and as shown certain of the rivets of the bars at the left of the sections pivotally support the hooks 14 which are designed to engage with the keepers 15 on the bars at the right of the adjacent sections as clearly shown in Figs. 3 and 5 of the drawings. he hooks are provided with tongues 16 on which are formed the surfaces 17 and 18, the latter being eccentrically disposedwith relation to the pivot points of the hooks while the former are concentrically disposed with relation thereto whereby when the hooks are adjusted downward the surfaces 18 will be first brought to bear against the keepers 15 to operate camlike, and finally cause the keepers to become lodged directly behind the shoulders defined by the surfaces 17 and 18 and so embraced thereby to prevent the hooks from accidentally moving to their released positions after the mold is set-up. The bars 3 and 4; of the adjacent wall sections are so arranged that when they interfit with one another their outer surfaces come flush with each other, and as a consequence thereof the hooks 14 may be freely connected with the keepers 15.

Each mold section has secured thereto, an angle bracket 18 which is provided with the off-set portion 19 and the tongue 20, the latter being spaced vertically from the section as illustrated in Fig. 8. The brackets of each horizontal series of mold units or sections are located in line with each other and collectively they are adapted to receive therebehind the vertical flanges 21of the angle iron lock bars 22. The lock bars are sufficiently heavy to act as weights to assist materially in holding the respective horizontal series of mold sections operatively connected together. As shown, two hooks 14 are employed for each section and disposed at the opposite sides of the bracket 18 whereby the lateral strain upon the walls of the mold will not be wholly applied to the hooks 14; but substantially transmitted to the horizontal medial points upon the sections to be taken up by the tie bars 18.

As shown in the drawings, the corner sections of the mold have the right angularly disposed wings 23 whereby the molded house will be formed with square corners. As the particular configuration of these corner sections lends nothing mechanically to the mold structure it is obvious that they may be substituted by sections of any desired desired.

The inner and outer walls A and B of the mold are adjustable relatively as to the diameter or thickness of the wall desired and in view thereof each mold section is provided with passages 24 through which the bolts 25 are adapted to be extended as shown in Fig. 1. The bolts of course become embedded in the concrete as the latter is poured between the walls and, if desired they may be left in the walls to reinforce the same, when the mold is knocked down, and the extremities of the bolts may be cut ofl so that in the finished structure the ends of the bolts come flush with the walls of the structure.

From the construction of the mold described it is understood that all of the parts thereof are of stock materials which when assembled as described combine to present a simple, strong and durable apparatus that may be manufactured at a minimum cost. The provision of means whereby the joints between the mold sections are securely closed and rendered water tight prevents the slush from escaping from between the walls of the mold, thereby eliminating the objectionable hardening of the cement in substantially web or rib form upon the exterior walls of the molded structure.

I claim A mold having wall sections, vertical bars and horizontal bars secured on the outer surface of each of the saidsections at their edges and formed and associated with the sections so as to define therewith respectively tongueand-grooved portions, the tongues at certain edges projecting beyond those edges the bars being provided with flat outer surfaces so that when the bars of one section are interfitted with bars of adjacent sections the flat surfaces of the adjacent bars will come flush with each other, a keeper on the vertical bar of one section, and a swinging hook on the vertical bar of the adjacent section, the latter extending over both fiat surfaces of adjacent bars and having detachable connection with the keeper and serving when engaged with the latter to hold the interfitting portions of adjacent bars in operative engagement with each other.

In testimony whereof I affix my signature in presence of two witnesses.

HOWARD C. WALKER.

shape according to the design of the corner Witnesses:

E. EnMoNsToN, Jr., WM. ALVINE. 

